Around 20 percent of the electricity required to melt steel scrap could be recovered with the method, according to a report in the latest issue of the research magazine "Pictures of the Future".
The solution here was taken from the solar-thermal sector - more specifically from Siemens VAI Metals, which uses salt storage units like those employed in such power plants. Here, experts extract heat from the exhaust gas and the salt mixture heats up to around 450 degrees Celsius. Water flows through the hot salt and the resulting steam is used to drive a turbine. The high salt temperature gives the process an efficiency rating of 24 percent, which is greater than that of the second possible option for generating electricity in electric arc furnaces. In this alternative option, steam is produced from the exhaust gas and then stored temporarily in pressurized boilers. However, salt storage units are not only cheaper than such boilers but also safer to operate.
The new solution recovers around 20 percent of the electricity used to run the furnace, which means it also lowers carbon dioxide (CO2) emissions - according to the power mix - by approximately 40 kilograms per ton of steel produced. Given a typical furnace capacity of 120 tons, this results in an annual CO2 reduction of around 30,000 tons. That, in turn, translates into up to five million euros in plant operator savings on electricity and CO2 certificates per year.
Dr. Norbert Aschenbrenner | Siemens InnovationNews
Open, flexible assembly platform for optical systems
24.01.2017 | Fraunhofer-Institut für Produktionstechnologie IPT
A big nano boost for solar cells
18.01.2017 | Kyoto University and Osaka Gas effort doubles current efficiencies
A Swedish-German team of researchers has cleared up a key process for the artificial production of silk. With the help of the intense X-rays from DESY's...
For the first time ever, a cloud of ultra-cold atoms has been successfully created in space on board of a sounding rocket. The MAIUS mission demonstrates that quantum optical sensors can be operated even in harsh environments like space – a prerequi-site for finding answers to the most challenging questions of fundamental physics and an important innovation driver for everyday applications.
According to Albert Einstein's Equivalence Principle, all bodies are accelerated at the same rate by the Earth's gravity, regardless of their properties. This...
An important step towards a completely new experimental access to quantum physics has been made at University of Konstanz. The team of scientists headed by...
Yersiniae cause severe intestinal infections. Studies using Yersinia pseudotuberculosis as a model organism aim to elucidate the infection mechanisms of these...
Researchers from the University of Hamburg in Germany, in collaboration with colleagues from the University of Aarhus in Denmark, have synthesized a new superconducting material by growing a few layers of an antiferromagnetic transition-metal chalcogenide on a bismuth-based topological insulator, both being non-superconducting materials.
While superconductivity and magnetism are generally believed to be mutually exclusive, surprisingly, in this new material, superconducting correlations...
19.01.2017 | Event News
10.01.2017 | Event News
09.01.2017 | Event News
24.01.2017 | Physics and Astronomy
24.01.2017 | Life Sciences
24.01.2017 | Health and Medicine